the worst school bus occurred in u.s. history after virginia tech happened on friday. the new town sandy hook elementary school. 26 people gunned down. 20 of them 6 and 7-olds, six of them, all women, stabbed at the school. the school psychologist and the principal, after they tried to stop the shooter, and the teachers to try to protect their students. for more on the massacre, we're joined by two guests from washington, d.c., john velleco of the director of federal affairs for gun owners of america agreed also the crips federal lobbyist. and we're joined by christian heyne, the legislative assistant and dressers or better for the coalition to stop gun violence he lost his mother to gun violence in 2005. his father narrowly survived, sustaining multiple gunshots. and still with us, paul barrett, author of, "glock: the rise of america's gun." let's start with christian heyne.